Outlet symbol autocad4/11/2023 ![]() It provides passage to drain the oil during overhauling or as and when required oil sample for testing. ![]() ![]() It provides passage to pour the transformer oil in the tank during purification or in case of shortage found in the tank. Transformer consists of the following parts and components.įigure 1 – 3 Phase, 500 kVA, 11/0.433 kV Natural Air Oil Cooled Distribution Transformer It is basically a static electrical device which steps down the primary voltage of 33kV or 11 kV to secondary distribution voltage of 415-440 volts between phases and 215 volts between phase and neutral through delta-star windings by electromagnetic induction without change in frequency. The distribution transformer is a main and largest equipment of distribution substation. The following equipment are installed in distribution substations: Lightening arresters, earthing of equipment and fencing is done for this purpose. Safety and protection of equipment as well as working personnel is also a considerable factor. 10 electrical equipment you can see in every distribution substation ![]()
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